Bladder Accumulators
Operating & Maintenance Instructions
Pre-Charging
5000 PSI Bottom Repairable Bladder Accumulators
A
B
C
D
Figure 1.
Figure 2.
Pre-Charging Procedure for 5000 PSI Bottom Repairable Bladder Accumulators.
1. Isolate the accumulator from the system and make sure hydraulic fluid pressure is zero.
10. SLOWLY open the valve on nitrogen bottle (Figure 2.) and allow the nitrogen gas to flow to the
accumulator. The pressure gauge should begin to register pressure.
2. Remove the gas valve protection guard and then the gas valve cap from the accumulator.
11. Once the desired gas pre-charge pressure has been reached, close valve on nitrogen bottle
3. To charge the accumulator, use a charging hose and gauge assembly similar to Stauff Charging (Figure 2.).
Kit # STBA-CK-B-P5, rated for 5,000 psig minimum.
12. Open valve A (Figure 1.) (Fully counter-clockwise) and bleed the trapped pressure in the gas
4. Before using the charging assembly (Figure 1.) make sure that valve A is completely open
line to zero by means of bleed valve B (Figure 1.), open valve B (turn counterclockwise)
(counter-clockwise), that bleed valve B (Figure 1.) is completely closed ( clockwise) and
until gauge reads 0 psig.
that the non-return valve C (Figure 1.) is capped.
13. Remove hose from non-return valve C (Figure 1.) and replace cap.
5. Connect the charging unit to the 5000 psi gas fill valve on the accumulator by
means of knurled cap D (Figure 1.).
14. Close the bleed valve B (Figure 1.) and wait a few minutes for pressure to stabilize.
6. Open the gas valve adapter on the accumulator (referring to the 5000 PSI gas valve STA-ASGV-1-15-P5) by securing the bottom hex on the gas valve with one (1) wrench while
unscrewing the top hex on the gas valve (counter clockwise) with a second (2) wrench. This will
open the poppet inside the gas valve. Note, four (4) turns should fully open the poppet.
7. Make sure the valve on the nitrogen bottle is completely closed, then fit the 5000 PSI nitrogen
gas valve adapter/hose assembly (included in Stauff Charging Kit # STBA-CK-B-P5 ) onto the
nitrogen bottle (Figure 2.).
8. Connect the other end of the gas hose to the non-return valve C (Figure 1.), after taking off its cap.
9. Turn valve A (Figure 1.) clockwise until it stops (Do not over Torque).
15. Screw valve A (Figure 1.) clockwise until pressure can be read on gauge. This should be
slightly higher than the required pressure.
16. Adjust to desired pressure by means of bleed valve B (Figure 1.), then, with a wrench screw in
the top hex on the accumulator gas valve until tight, then remove charging unit from the accumulator gas valve and from the nitrogen bottle (after making sure that the nitrogen bottle valve is
completely closed.
17. Reinstall the gas valve cap and protective guard cap on the accumulator. The accumulator is
now ready for use.
NOTE: Allow the accumulator to rest approximately 10-15 minutes after gas pre-charging.
This will allow gas temperature to adjust and equalize. Recheck gas pressure and adjust
if necessary. Check accumulator gas valve for any leaks with soapy water. Always wear
safely glasses.
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